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132 lines
3.6 KiB
LLVM
132 lines
3.6 KiB
LLVM
; Test 32-bit byteswaps from memory to registers.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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declare i32 @llvm.bswap.i32(i32 %a)
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; Check LRV with no displacement.
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define i32 @f1(i32 *%src) {
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; CHECK-LABEL: f1:
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; CHECK: lrv %r2, 0(%r2)
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; CHECK: br %r14
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%a = load i32, i32 *%src
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%swapped = call i32 @llvm.bswap.i32(i32 %a)
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ret i32 %swapped
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}
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; Check the high end of the aligned LRV range.
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define i32 @f2(i32 *%src) {
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; CHECK-LABEL: f2:
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; CHECK: lrv %r2, 524284(%r2)
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; CHECK: br %r14
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%ptr = getelementptr i32, i32 *%src, i64 131071
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%a = load i32, i32 *%ptr
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%swapped = call i32 @llvm.bswap.i32(i32 %a)
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ret i32 %swapped
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}
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; Check the next word up, which needs separate address logic.
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; Other sequences besides this one would be OK.
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define i32 @f3(i32 *%src) {
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; CHECK-LABEL: f3:
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; CHECK: agfi %r2, 524288
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; CHECK: lrv %r2, 0(%r2)
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; CHECK: br %r14
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%ptr = getelementptr i32, i32 *%src, i64 131072
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%a = load i32, i32 *%ptr
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%swapped = call i32 @llvm.bswap.i32(i32 %a)
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ret i32 %swapped
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}
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; Check the high end of the negative aligned LRV range.
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define i32 @f4(i32 *%src) {
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; CHECK-LABEL: f4:
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; CHECK: lrv %r2, -4(%r2)
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; CHECK: br %r14
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%ptr = getelementptr i32, i32 *%src, i64 -1
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%a = load i32, i32 *%ptr
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%swapped = call i32 @llvm.bswap.i32(i32 %a)
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ret i32 %swapped
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}
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; Check the low end of the LRV range.
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define i32 @f5(i32 *%src) {
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; CHECK-LABEL: f5:
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; CHECK: lrv %r2, -524288(%r2)
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; CHECK: br %r14
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%ptr = getelementptr i32, i32 *%src, i64 -131072
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%a = load i32, i32 *%ptr
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%swapped = call i32 @llvm.bswap.i32(i32 %a)
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ret i32 %swapped
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}
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; Check the next word down, which needs separate address logic.
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; Other sequences besides this one would be OK.
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define i32 @f6(i32 *%src) {
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; CHECK-LABEL: f6:
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; CHECK: agfi %r2, -524292
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; CHECK: lrv %r2, 0(%r2)
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; CHECK: br %r14
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%ptr = getelementptr i32, i32 *%src, i64 -131073
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%a = load i32, i32 *%ptr
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%swapped = call i32 @llvm.bswap.i32(i32 %a)
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ret i32 %swapped
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}
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; Check that LRV allows an index.
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define i32 @f7(i64 %src, i64 %index) {
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; CHECK-LABEL: f7:
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; CHECK: lrv %r2, 524287({{%r3,%r2|%r2,%r3}})
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; CHECK: br %r14
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%add1 = add i64 %src, %index
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%add2 = add i64 %add1, 524287
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%ptr = inttoptr i64 %add2 to i32 *
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%a = load i32, i32 *%ptr
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%swapped = call i32 @llvm.bswap.i32(i32 %a)
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ret i32 %swapped
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}
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; Test a case where we spill the source of at least one LRVR. We want
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; to use LRV if possible.
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define i32 @f8(i32 *%ptr0) {
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; CHECK-LABEL: f8:
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; CHECK: lrv {{%r[0-9]+}}, 16{{[04]}}(%r15)
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; CHECK: br %r14
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%val0 = call i32 @foo()
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%val1 = call i32 @foo()
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%val2 = call i32 @foo()
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%val3 = call i32 @foo()
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%val4 = call i32 @foo()
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%val5 = call i32 @foo()
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%val6 = call i32 @foo()
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%val7 = call i32 @foo()
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%val8 = call i32 @foo()
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%val9 = call i32 @foo()
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%swapped0 = call i32 @llvm.bswap.i32(i32 %val0)
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%swapped1 = call i32 @llvm.bswap.i32(i32 %val1)
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%swapped2 = call i32 @llvm.bswap.i32(i32 %val2)
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%swapped3 = call i32 @llvm.bswap.i32(i32 %val3)
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%swapped4 = call i32 @llvm.bswap.i32(i32 %val4)
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%swapped5 = call i32 @llvm.bswap.i32(i32 %val5)
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%swapped6 = call i32 @llvm.bswap.i32(i32 %val6)
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%swapped7 = call i32 @llvm.bswap.i32(i32 %val7)
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%swapped8 = call i32 @llvm.bswap.i32(i32 %val8)
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%swapped9 = call i32 @llvm.bswap.i32(i32 %val9)
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%ret1 = add i32 %swapped0, %swapped1
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%ret2 = add i32 %ret1, %swapped2
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%ret3 = add i32 %ret2, %swapped3
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%ret4 = add i32 %ret3, %swapped4
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%ret5 = add i32 %ret4, %swapped5
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%ret6 = add i32 %ret5, %swapped6
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%ret7 = add i32 %ret6, %swapped7
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%ret8 = add i32 %ret7, %swapped8
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%ret9 = add i32 %ret8, %swapped9
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ret i32 %ret9
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}
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declare i32 @foo()
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